class (version 7.3-0)

somgrid: Plot SOM Fits

Description

Plotting functions for SOM results.

Usage

somgrid(xdim = 8, ydim = 6, topo = c("rectangular", "hexagonal"))
## S3 method for class 'somgrid':
plot(x, type = "p", ...)
## S3 method for class 'SOM':
plot(x, ...)

Arguments

xdim, ydim

dimensions of the grid

topo

the topology of the grid.

x

an object inheriting from class "somgrid" or "SOM".

type, ...

graphical parameters.

Value

• For somgrid, an object of class "somgrid", a list with components
• pts
  a two-column matrix giving locations for the grid points.
• xdim, ydim, topo
  as in the arguments to somgrid.

Details

The class "somgrid" records the coordinates of the grid to be used for (batch or on-line) SOM: this has a plot method.

The plot method for class "SOM" plots a stars plot of the representative at each grid point.

References

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.

See Also

batchSOM, SOM